A Pair of Camper Shell Cap SNUGTOP LEER Nitro-Prop Strut Spring Shock REP 17" extended length x 10 " compressed length x 10 LB Pressure Extended Length: 17" (center to center of ball socket ends) Compressed Length: 10" Force: 10 pounds of pressure (Per Prop) End Fitting: 10mm Ball Socket and 10mm Ball Socket Set of Two